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10.861 Aktuelle Fachpublikationen in Organic Letters

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Total Synthesis of (−)-Xestosaprol N and O

19.01.2018 | Yingbo Shi; Yang Ji; Kunyun Xin; Shuanhu Gao, Organic Letters, 2018

Organic Letters DOI: 10.1021/acs.orglett.7b03865

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Removable Water-Soluble Olefin Metathesis Catalyst via Host–Guest Interaction

19.01.2018 | Cheoljae Kim; Brian A. Ondrusek; Hoyong Chung, Organic Letters, 2018

Organic Letters DOI: 10.1021/acs.orglett.7b03871

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Catalytic Enantioselective Reaction of 2H-Azirines with Thiols Using Cinchona Alkaloid Sulfonamide Catalysts

19.01.2018 | Shuichi Nakamura; Daiki Hayama; Masataka Miura; Tsubasa Hatanaka; Yasuhiro Funahashi, Organic Letters, 2018

Organic Letters DOI: 10.1021/acs.orglett.7b04022

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Oxidation of Isodiphenylfluorindine: Routes to 13-Oxoisodiphenylfluorindinium Perchlorate and Fluorindine Cruciform Dimers

19.01.2018 | Georgia A. Zissimou; Andreas Kourtellaris; Panayiotis A. Koutentis, Organic Letters, 2018

Isodiphenylfluorindine (5) reacts with K2Cr2O7/H+ to give 13-oxoisodiphenylfluorindinium perchlorate (7) (75%), but with phenyliodine bis(trifluoroacetate) (PIFA) or MnO2 it gives the zwitterionic and quinoidal cruciform 13,13′-dimers 11 (85%) and 12 (89%), respectively. The zwitterionic ...

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The Acid-Free Cyclopropanol-Minisci Reaction Reveals the Catalytic Role of Silver–Pyridine Complexes

19.01.2018 | Andrei Nikolaev; Claude Y. Legault; Minhao Zhang; Arturo Orellana, Organic Letters, 2018

A well-defined homogeneous silver precatalyst can be utilized for the direct C–H functionalization of a wide range of aromatic nitrogen heterocycles with cyclopropanols under acid-free conditions. This reaction can be conducted on gram-scale and with low catalyst loadings (as low as 1%), which is ...

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Rhodium(III)-Catalyzed Directed C–H Coupling with Methyl Trifluoroacrylate: Diverse Synthesis of Fluoroalkenes and Heterocycles

19.01.2018 | Tian-Jun Gong; Meng-Yu Xu; Shang-Hai Yu; Chu-Guo Yu; Wei Su; Xi Lu; Bin Xiao; Yao Fu, Organic Letters, 2018

Organic Letters DOI: 10.1021/acs.orglett.7b03677

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Chemo-, Regio-, and Enantioselective Rhodium-Catalyzed Allylation of Triazoles with Internal Alkynes and Terminal Allenes

19.01.2018 | Dino Berthold; Bernhard Breit, Organic Letters, 2018

The rhodium-catalyzed asymmetric N1-selective and regioselective coupling of triazole derivatives with internal alkynes and terminal allenes gives access to secondary and tertiary allylic triazoles in very good enantioselectivities. For this process, three new members of the JosPOphos ligand ...

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Application of Sulfur Ylides in 1,2-Difunctionalization of Arynes via Insertion into a C–S σ-Bond

19.01.2018 | Milind M. Ahire; Mahesh B. Thoke; Santosh B. Mhaske, Organic Letters, 2018

Organic Letters DOI: 10.1021/acs.orglett.7b04003

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Formal (4 + 1)-Addition of Allenoates to o-Quinone Methides

19.01.2018 | Katharina Zielke; Mario Waser, Organic Letters, 2018

Organic Letters DOI: 10.1021/acs.orglett.7b03906

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Catalytically Enantioselective Synthesis of Acyclic α-Tertiary Amines through Desymmetrization of 2-Substituted 2-Nitro-1,3-diols

18.01.2018 | Shan-Shui Meng; Wu-Bang Tang; Wen-Hua Zheng, Organic Letters, 2018

Highly enantioselective synthesis of acyclic α-tertiary amines through asymmetric desymmetrization is reported. This approach is based on chiral phosphoric acid mediated, enantioselective, oxidative desymmetrization of 2-substituted 2-nitro-1,3-diolbenzylidine acetals in the presence of DMDO as ...

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